Today's teenagers are growing up more slowly. Researchers looked at the behaviour of 8 million teens in seven countries over the past 40 years. Today's teens are not as responsible as teenagers from the 70s, 80s and 90s. A professor said their development has slowed down. She said today's 18-year-olds are like 15-year-olds used to be. She said teenagers are taking fewer risks than they did before.
Today's teenagers take longer to do things their parents did. They are older when they date, work and drive. The professor said they have a, "slow life strategy". More teenagers live with their parents instead of renting their own room. One reason for this is teenagers spend a long time online. They use social media, look at videos or play games instead of living in the "real world". Another reason is parents do too much for their children.